Tagged Questions

Domain Name Service, a method of converting a textual doman name to an IP address

learn more… | top users | synonyms

1
vote
1answer
339 views

Fast External DNS Servers and My Intranet

The local DNS servers, where I work, stink. They're absurdly slow and often completely fail to resolve web domains during certain periods of heavy sunspot activity. In response, I've just added ...
1
vote
1answer
912 views

Ping and curl resolve to one IP, dig/nslookup/host resolve to another

OK, I have a very interesting case. I have a custom DNS server that is vending out IP addresses to varying servers in my test network. If I use dig, nslookup, or host, it tells me that it's properly ...
6
votes
1answer
2k views

User specific hosts file in Mac OS X

I'm working on an OS X 10.6.8 machine, for which I do not have superuser privileges. I'd like to imitate the effect of adding an entry to the hosts file, i.e. have a certain domain resolve to a ...
1
vote
1answer
788 views

Using dnsmasq when not connected to the Internet

I'm routing dns requests through dnsmasq so that domains I'm using for local development point to 127.0.0.1. This works great when I'm connected to the Internet via Wi-Fi or ethernet, but I start to ...
7
votes
1answer
5k views

Is it possible to configure OS X to use the domain-name supplied by DHCP option 15?

I run a small home network, and have configured my DHCP server to provide a domain name with all responses. My MacBook Air (running 10.7.3) places the provided domain in the DNS search path, but does ...
3
votes
1answer
2k views

Map certain ports to URLs via hosts file or DNS resolver

I use SSH tunnelling extensively to gain access to remote machines that are behind a firewall. So to access a development server I use something like http://localhost:8888 which is forwarded to port ...
2
votes
1answer
2k views

How to fix when I can nslookup and dig an internal hostname, but I cannot ping or ssh to the internal machine?

I can nslookup and dig an internal hostname, and I get a rapid response, but I cannot ping or ssh to the server. All external hostnames work fine for both ping, ssh, dig or nslookup. ssh -vvv ...
2
votes
0answers
344 views

Browsing to a nested subdomain resolves wrong page

Our corporate network has some web applications hosted in a nested subdomain hierarchy. A "subdomain's subdomain", as you will. For example: Root-> http://*.mydomain.com (resolves to: 192.2.2.200) ...
2
votes
0answers
2k views

Can Time Capsule/Airport (4th gen) serve local DNS?

I just got a 4th gen Time Capsule for my wife to use as her own backup server, and I'm potentially interested in using it as the main router and Wifi AP on my home network. My current router and AP is ...
3
votes
1answer
531 views

Network's DNS queries redirection to localhost

Before saying anything, I would like you to know that my experience in the field of network administration is about 3 days long, so please treat me like the newbie I am. I have also been looking ...
1
vote
1answer
305 views

Local DNS server access delays

Access to a local DNS server is always delayed by ~1 second. I enabled the DNS server on OS-X Lion and it does indeed work. However when I query it using 'dig' (or nslookup) there is a delay of ...
1
vote
2answers
3k views

How do I get rid of browser redirect malware?

I am using Mac OS X Leopard on a MacBook Pro. I must have been very careless at some point, since I managed to let some malware install in it. While browsing I get randomly redirected to different ...
2
votes
0answers
239 views

Lion Server - DNS crashing

Every now and then (once per week?), my Mac Mini (2011, 8GB RAM i5) running Lion Server, stops the DNS server bringing my network to a grinding halt. The only way I have found to get it to restart is ...
0
votes
1answer
735 views

DNS Problem with my Macbook Pro

I have a problem with my Macbook Pro. I suspend it and if I should open it up and the wifi is connected and all looks pretty well. But I have no connection with my DNS Server. Other devices works ...
2
votes
1answer
322 views

Internet page not loading, ping not working but host www.example.com return an IP

Sorry I'm being vague because I don't even know where the problem can be. Yesterday I was using the internet just fine. Today on the same wifi router and on another 3G connection, I couldn't access ...
3
votes
1answer
410 views

What is OS X's equivalent of Linux's NSS?

Anyone familiar with the internals of Linux knows about NSS; it's the subsystem that services, like gethostname() and such, delegate to. The code that actually makes DNS queries or reads /etc/passwd, ...
3
votes
2answers
3k views

Can I set up domain filtering on an Airport Extreme?

I'm wondering if it is possible to set up domain filtering on an Airport Extreme based home network. Specifically, I'd like to block just rad.msn.com, and I need to do that at the network level.
1
vote
0answers
80 views

Why opening a ssh connection to Lion is taking too long?

Why is SSH taking too long to open when I SSH to Lion. I have to wait ~30s to see the Password prompt. The DNS is working on the Lion server.
5
votes
1answer
963 views

Lion Server DHCP randomly loses settings and reverts to defaults

I’ve been trying to set up Lion Server on a Mac Pro with it acting as the router/gateway/firewall/DNS/NAT and DHCP. I’ve been trying to setup an internal-only network named mycompany.something. After ...
3
votes
2answers
663 views

Unable to revert changes to hosts file in OS X Lion

I edited the hosts file and added: 10.0.0.1 devsys.crossreader.net Later I commented out the entry: #10.0.0.1 devsys.crossreader.net When I ping or browse to devsys.crossreader.net the returning ...
4
votes
1answer
423 views

DNS: Search Domains not working correctly?

I am running OSX Lion. I've looked all over the web for solutions to the issue I'm having and can't find a fix. I've found several entries where uses are trying to resolve custom_hostname.dev (etc, ...
41
votes
11answers
58k views

DNS not resolving on Mac OS

Some of my coworkers are having troubles on their Macs - DNS resolution does not work under Mac OS. They're running Snow Leopard 10.6.8. They can use DNS in a Windows 7 virtual machine (VMware Fusion ...
6
votes
1answer
2k views

How to set custom DNS entry for a particular wifi connection

Is there a way to set custom DNS settings for a single wifi connection without affecting other connections? I use my laptop at home and work. When at work I need to type in an IP address of a local ...
1
vote
1answer
123 views

How to resolve network issue or DNS to access web page on Snow Leopard Server?

I have my network setup like as follows: internet > router 1 > ethernet ports > switch > router 2 I have a Mac OS X Snow Leopard Server connected to "router 1", but it is so slow when accessing a ...
14
votes
5answers
13k views

DNS lookups fail with e.g. `ping`, but work with `host`

I'm using pfSense 2.0rc3, and I've set it up as a DNS forwarder and enabled "Register DHCP leases in DNS forwarder" and what I understand are all the appropriate settings to get DNS server for local ...
2
votes
1answer
773 views

OS X assumes hostname of other network computer: how to prevent this?

I just came across a strange quirck: I use my MacBook Pro in the office. Every computer is assigned their IP addresses by a DHCP server. It seems to be the case now, however, that my OS X changed my ...
1
vote
1answer
1k views

What are the domains of the iTunes & Software Update CDNs?

Background info: the various iTunes stores (and I think Software Update) use the a CDN to deliver all those jigabits of data. Google DNS can mess with the speed of these CDNs. I like using Google ...
10
votes
4answers
10k views

How can I quickly change DNS server

I often like to use a non-network specific DNS server (like Google's public DNS 8.8.8.8). However, many public wi-fi locations won't load their "terms of service, click here" page during the ...
0
votes
1answer
616 views

Is it possible to bypass a proxy when the proxy settings are set to Auto Proxy Config?

I've set up Automatic Proxy Configuration (PAC) in OSX Snow Leopard to point to a URL. I've also filled out the "Bypass proxy settings for these Hosts & Domains" box because I want to skip the ...
1
vote
0answers
219 views

DNS gone after wakeup

I'm having problems with the DNS resolution after a wakeup from sleep. The system I'm running is Mac OS X Lion 10.7, and I am properly connected to my Wifi. When I issue a ping google.com in the ...
1
vote
1answer
900 views

How do you access a subdomain on localhost with VMWare Fusion on a Mac?

I am able to access localhost on a Mac through Windows XP on VMWare Fusion by using my Mac username like this: http://username.local:3000/ But how do I do that with a subdomain, something like ...
1
vote
1answer
1k views

Macbook can't resolve any domain names

I have a 13" Macbook running Snow Leopard 10.6.6 which is unable to go to any URL on either my office or hotel networks. I have no proxy or firewall enabled on the computer - and have connected to ...
2
votes
1answer
12k views

Multiple IP addresses for same host name in /private/etc/hosts?

I have a corporate mail account (exchange 2007) that uses a self-signed SSL certificate. No matter what I do, Mail always complains about this when I connect. If I look at the details it always says ...
1
vote
1answer
1k views

Mac doesn't recognize hosts on local network

I have a Linux server in my cupboard. My Windows machines can connect to it via its hostname. I have never configured any DNS server; all I did was assign the Linux box a name when I installed Ubuntu ...
0
votes
0answers
272 views

iMac running Snow Leopard won't resolve DNS

Having problems with an iMac that I bought today. It's a 21", 2ghz Dual Core with 4GB ram. I'm connecting to my router via ethernet, and I can load up my remote websites and servers using the ip ...
0
votes
1answer
224 views

Reason for perpetual dynamic DNS updates?

(Crossposted from Serverfault) I'm using dynamic DNS (the "adult" version from RFC 2136, not à la DynDNS), and for a while now I've been seeing my laptops with MacOS 10.6.x churning out updates about ...
2
votes
2answers
537 views

How do I set up DynDNS on my MacBook?

I want to create a host name that points to my MacBook dynamically, so I can have a chance to take back the control if it was stolen. I opened ssh and vnc, but I have no idea how to find my machine. ...
0
votes
1answer
75 views

How to reach websites that have failed while offline?

When I try to open a website when my connection is down or while my modem is starting up, my Mac flags this url as unreachable. When the connection is finally open and internet available, I still ...
3
votes
2answers
442 views

iPad and iPod virus?

Every now and then my iPad or iPod touch will redirect my to a particular site in Safari. Could this be malware of sorts that has crept on to my iMac and then my iOS devices? I don't think it's a ...
1
vote
2answers
2k views

Why do local network hostnames resolve only in certain cases?

I have a linksys router which runs "tomato" Linux and serves as the local DNS server. It runs dnsmasq. I recently upgraded from OS X 10.4 to 10.6. Since then, resolution of hostnames on my local ...
9
votes
2answers
6k views

How do I flush the DNS cache on a OS X 10.6 machine?

Trying to flush the local DNS cache. How is this done on Snow Leopard? Using System Preferences and using the terminal?